define(function(require, exports, module) {
	/*
	 * Metadata - jQuery plugin for parsing metadata from elements
	 *
	 * Copyright (c) 2006 John Resig, Yehuda Katz, J�örn Zaefferer, Paul McLanahan
	 *
	 * Dual licensed under the MIT and GPL licenses:
	 *   http://www.opensource.org/licenses/mit-license.php
	 *   http://www.gnu.org/licenses/gpl.html
	 *
	 * Revision: $Id: jquery.metadata.js 4187 2007-12-16 17:15:27Z joern.zaefferer $
	 *
	 */

	/**
	 * Sets the type of metadata to use. Metadata is encoded in JSON, and each property
	 * in the JSON will become a property of the element itself.
	 *
	 * There are three supported types of metadata storage:
	 *
	 *   attr:  Inside an attribute. The name parameter indicates *which* attribute.
	 *
	 *   class: Inside the class attribute, wrapped in curly braces: { }
	 *
	 *   elem:  Inside a child element (e.g. a script tag). The
	 *          name parameter indicates *which* element.
	 *
	 * The metadata for an element is loaded the first time the element is accessed via jQuery.
	 *
	 * As a result, you can define the metadata type, use $(expr) to load the metadata into the elements
	 * matched by expr, then redefine the metadata type and run another $(expr) for other elements.
	 *
	 * @name $.metadata.setType
	 *
	 * @example <p id="one" class="some_class {item_id: 1, item_label: 'Label'}">This is a p</p>
	 * @before $.metadata.setType("class")
	 * @after $("#one").metadata().item_id == 1; $("#one").metadata().item_label == "Label"
	 * @desc Reads metadata from the class attribute
	 *
	 * @example <p id="one" class="some_class" data="{item_id: 1, item_label: 'Label'}">This is a p</p>
	 * @before $.metadata.setType("attr", "data")
	 * @after $("#one").metadata().item_id == 1; $("#one").metadata().item_label == "Label"
	 * @desc Reads metadata from a "data" attribute
	 *
	 * @example <p id="one" class="some_class"><script>{item_id: 1, item_label: 'Label'}</script>This is a p</p>
	 * @before $.metadata.setType("elem", "script")
	 * @after $("#one").metadata().item_id == 1; $("#one").metadata().item_label == "Label"
	 * @desc Reads metadata from a nested script element
	 *
	 * @param String type The encoding type
	 * @param String name The name of the attribute to be used to get metadata (optional)
	 * @cat Plugins/Metadata
	 * @descr Sets the type of encoding to be used when loading metadata for the first time
	 * @type undefined
	 * @see metadata()
	 */


	require('./jquery.validate');

	(function($) {

		$.extend({
			metadata: {
				defaults: {
					type: 'class',
					name: 'metadata',
					cre: /({.*})/,
					single: 'metadata'
				},
				setType: function(type, name) {
					this.defaults.type = type;
					this.defaults.name = name;
				},
				get: function(elem, opts) {
					var settings = $.extend({}, this.defaults, opts);
					// check for empty string in single property
					if (!settings.single.length) settings.single = 'metadata';

					var data = $.data(elem, settings.single);
					// returned cached data if it already exists
					if (data) return data;

					data = "{}";

					if (settings.type == "class") {
						var m = settings.cre.exec(elem.className);
						if (m)
							data = m[1];
					} else if (settings.type == "elem") {
						if (!elem.getElementsByTagName)
							return undefined;
						var e = elem.getElementsByTagName(settings.name);
						if (e.length)
							data = $.trim(e[0].innerHTML);
					} else if (elem.getAttribute != undefined) {
						var attr = elem.getAttribute(settings.name);
						if (attr)
							data = attr;
					}

					if (data.indexOf('{') < 0)
						data = "{" + data + "}";

					data = eval("(" + data + ")");

					$.data(elem, settings.single, data);
					return data;
				}
			}
		});

		/**
		 * Returns the metadata object for the first member of the jQuery object.
		 *
		 * @name metadata
		 * @descr Returns element's metadata object
		 * @param Object opts An object contianing settings to override the defaults
		 * @type jQuery
		 * @cat Plugins/Metadata
		 */
		$.fn.metadata = function(opts) {
			return $.metadata.get(this[0], opts);
		};

	})(jQuery);

});